2018 REVmd of the spec introduces the max channel switch time
element which is optionally included in beacons/probes when there
is a channel switch / extended channel switch element.
The value represents the maximum delay between the time the AP
transmitted the last beacon in current channel and the expected
time of the first beacon in the new channel, in TU.

Parse the value and pass it to the driver.
Signed-off-by: NSara Sharon <sara.sharon@intel.com>
Signed-off-by: NLuca Coelho <luciano.coelho@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

This extends the NL80211_CMD_ASSOCIATE event case to report
NL80211_ATTR_REQ_IE similarly to what is already done with the
NL80211_CMD_CONNECT events if the driver provides this information. In
practice, this adds (Re)Association Request frame information element
reporting to mac80211 drivers for the cases where user space SME is
used.

This provides more information for user space to figure out which
capabilities were negotiated for the association. For example, this can
be used to determine whether HT, VHT, or HE is used.
Signed-off-by: NJouni Malinen <jouni@codeaurora.org>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

This patch is to use eth_broadcast_addr() to assign broadcast address
insetad of memset().
Signed-off-by: NMao Wenan <maowenan@huawei.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

REGULATORY_WIPHY_SELF_MANAGED as set here breaks NL80211_CMD_GET_REG,
because it expects the wiphy to do regulatory management. Since
virt_wifi does not do regulatory management, this triggers a WARN_ON in
NL80211_CMD_GET_REG and fails the netlink command.

Removing REGULATORY_WIPHY_SELF_MANAGED fixes the problem and the virtual
wireless network continues to work.
Signed-off-by: NCody Schuffelen <schuffelen@google.com>
Acked-by: NAlistair Strachan <astrachan@google.com>
Acked-by: NGreg Hartman <ghartman@google.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Fix cfg80211_gen_new_bssid() to not rely on u64 modulo arithmetic,
which isn't needed since we really just want to mask there. Also,
clean it up to calculate the mask only once and use GENMASK_ULL()
instead of open-coding the mask calculation.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Enforce the first argument to be a correct type of a pointer to struct
element and avoid unnecessary typecasts from const to non-const pointers
(the change in validate_ie_attr() is needed to make this part work). In
addition, avoid signed/unsigned comparison within for_each_element() and
mark struct element packed just in case.
Signed-off-by: NJouni Malinen <j@w1.fi>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Jouni reports that in some cases it is possible that getting
disconnected (or stopping AP, after previous patches) results
in further operations hitting the window within the regulatory
core restoring the regdomain to the defaults. The reason for
this is that we have to call out to CRDA or otherwise do some
asynchronous work, and thus can't do the restore atomically.

However, we've previously seen all the data we need to do the
restore, so we can hang on to that data and use it later for
the restore. This makes the whole thing happen within a single
locked section and thus atomic.

However, we can't *always* do this - there are unfortunately
cases where the restore needs to re-request, because this is
also used (abused?) as an error recovery process, so make the
new behaviour optional and only use it when doing a regular
restore as described above.
Reported-by: NJouni Malinen <j@w1.fi>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

The data/datalen argument names cannot be used as those
are also the struct element names, fix that.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

This finally merges the multi-BSSID code. This is the result of a
long collaboration between the team at Qualcomm (Peng and Jouni)
and our team at Intel (mostly Sara).
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Add the missing kernel-doc for the new multi-BSSID fields
in struct cfg80211_bss.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

This can be used to test cfg80211 support for Multi-BSSID scan result
parsing.
Signed-off-by: NJouni Malinen <jouni@codeaurora.org>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

new_ie is used as a temporary storage for the generation of
the new elements. However, after copying from it the memory
wasn't freed and leaked. Free it.
Signed-off-by: NSara Sharon <sara.sharon@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Extension IEs have ID 255 followed by extension ID. Current
code is buggy in handling it in two ways:
1. When checking if IE is in the frame, it uses just the ID, which
   for extension elements is too broad.
2. It uses 0xFF to mark copied IEs, which will result in not copying
   extension IEs from the subelement.

Fix both issue.
Signed-off-by: NSara Sharon <sara.sharon@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Set multi-bssid support flags according to driver support.
Signed-off-by: NSara Sharon <sara.sharon@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Add support for multi-bssid.

This includes:
- Parsing multi-bssid element
- Overriding DTIM values
- Taking into account in various places the inner BSSID instead of
  transmitter BSSID
- Save aside some multi-bssid properties needed by drivers
Signed-off-by: NSara Sharon <sara.sharon@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

This makes for much simpler code, simply walk through all
the elements and check that the last one found ends with
the end of the data. This works because if any element is
malformed the walk is aborted, we end up with a mismatch.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

When the new IEs are generated, the multiple BSSID elements
are not saved. Save aside properties that are needed later
for PS.
Signed-off-by: NSara Sharon <sara.sharon@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

We currently have a number of helpers to find elements that just
return a u8 *, change those to return a struct element and add
inlines to deal with the u8 * compatibility.

Note that the match behaviour is changed to start the natch at
the data, so conversion from _ie_match to _elem_match need to
be done carefully.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

This will enable reuse by mac80211.
Signed-off-by: NSara Sharon <sara.sharon@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Instead of open-coding the element walk, use the new macro.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Parsing and exposing nontransmitted APs is problematic
when underlying HW doesn't support it. Do it only if
driver indicated support. Allow HE restriction as well,
since the HE spec defined the exact manner that Multiple
BSSID set should behave. APs that not support the HE
spec will have less predictable Multiple BSSID set
support/behavior
Signed-off-by: NSara Sharon <sara.sharon@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Previously the transmitted BSS and the non-trasmitted BSS list were
defined in struct cfg80211_internal_bss. Move them to struct cfg80211_bss
since mac80211 needs this info.
Signed-off-by: NSara Sharon <sara.sharon@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

When holding data of the non-transmitting BSS, we need to keep the
transmitting BSS data on. Otherwise it will be released, and release
the non-transmitting BSS with it.
Signed-off-by: NSara Sharon <sara.sharon@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Use the new for_each_element() helper here, we cannot use
for_each_subelement() since we have a fixed 1 byte before
the subelements start.

While at it, also fix le16_to_cpup() to be get_unaligned_le16()
since we don't know anything about alignment.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

This extends cfg80211 BSS table processing to be able to parse Multiple
BSSID element from Beacon and Probe Response frames and to update the
BSS profiles in internal database for non-transmitted BSSs.
Signed-off-by: NPeng Xu <pxu@codeaurora.org>
Signed-off-by: NSara Sharon <sara.sharon@intel.com>
Signed-off-by: NJouni Malinen <jouni@codeaurora.org>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

This will allow iterating over multiple BSSs inside
cfg80211_bss, in case of multiple BSSID.
Signed-off-by: NSara Sharon <sara.sharon@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

In multiple BSSID, we have nested IEs inside the multiple
BSSID IE, that override the external ones for that specific
BSS. As preparation for supporting that, pass 2 BSSIDs to the
parse function, the transmitter, and the selected BSSID, so
it can know which IEs to choose. If the selected BSSID is
NULL, the outer ones will be applied.

Change ieee80211_bss_info_update to parse elements itself,
instead of receiving them parsed, so we have the relevant
bss entry in hand.
Signed-off-by: NSara Sharon <sara.sharon@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Rather than always iterating elements from frames with pure
u8 pointers, add a type "struct element" that encapsulates
the id/datalen/data format of them.

Then, add the element iteration macros
 * for_each_element
 * for_each_element_id
 * for_each_element_extid

which take, as their first 'argument', such a structure and
iterate through a given u8 array interpreting it as elements.

While at it and since we'll need it, also add
 * for_each_subelement
 * for_each_subelement_id
 * for_each_subelement_extid

which instead of taking data/length just take an outer element
and use its data/datalen.

Also add for_each_element_completed() to determine if any of
the loops above completed, i.e. it was able to parse all of
the elements successfully and no data remained.

Use for_each_element_id() in cfg80211_find_ie_match() as the
first user of this.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

This makes the age information for cfg80211 scan results more accurate
and fixes issues with wpa_supplicant dropping "old" scan results (e.g.,
"wlan0: Own scan request started a scan in 0.000456 seconds") that
looked like would have been received before a scan started due to the
inaccuracy of the default timing mechanism for calculating the BSS entry
age. This makes hwsim test cases significantly more robust to run.
Signed-off-by: NJouni Malinen <j@w1.fi>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Sven Auhagen reports that if he changes a SFP+ module for a SFP module
on the Macchiatobin Single Shot, the link does not come back up.  For
Sven, it is as easy as:

- Insert a SFP+ module connected, and use ping6 to verify link is up.
- Remove SFP+ module
- Insert SFP 1000base-X module use ping6 to verify link is up: Link
  up event did not trigger and the link is down

but that doesn't show the problem for me.  Locally, this has been
reproduced by:

- Boot with no modules.
- Insert SFP+ module, confirm link is up.
- Replace module with 25000base-X module.  Confirm link is up.
- Set remote end down, link is reported as dropped at both ends.
- Set remote end up, link is reported up at remote end, but not local
  end due to lack of link interrupt.

Fix this by setting up both GMAC and XLG interrupts for port 0, but
only unmasking the appropriate interrupt according to the current mode
set in the mac_config() method.  However, only do the mask/unmask
dance when we are really changing the link mode to avoid missing any
link interrupts.
Tested-by: NSven Auhagen <sven.auhagen@voleatech.de>
Signed-off-by: NRussell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Use the phy_interface_mode_is_8023z() helper for detecting interface
modes that use 802.3z serial encoding.  This is equivalent to testing
for both 1000base-X and 2500base-X.
Signed-off-by: NRussell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Moritz Fischer says:

====================
nixge: Fixed-link support

This series adds fixed-link support to nixge.

The first patch corrects the binding to correctly reflect
hardware that does not come with MDIO cores instantiated.

The second patch adds fixed link support to the driver.

The third patch updates the binding document with the now
optional (formerly required) phy-handle property and references
the fixed-link docs.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Update device-tree binding with fixed-link support.

With fixed-link support the formerly required property 'phy-handle'
is now optional if 'fixed-link' child is present.
Signed-off-by: NMoritz Fischer <mdf@kernel.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Add support for fixed-link configurations to nixge driver.
Signed-off-by: NMoritz Fischer <mdf@kernel.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Make MDIO child optional and only instantiate the
MDIO bus if the child is actually present.

There are currently no (in-tree) users of this
binding; all (out-of-tree) users use overlays that
get shipped together with the FPGA images that contain
the IP.

This will significantly increase maintainabilty
of future revisions of this IP.
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NMoritz Fischer <mdf@kernel.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

All users of the fixed_phy_add() pass -1 as GPIO number
to the fixed phy driver, and all users of fixed_phy_register()
pass -1 as GPIO number as well, except for the device
tree MDIO bus.

Any new users should create a proper device and pass the
GPIO as a descriptor associated with the device so delete
the GPIO argument from the calls and drop the code looking
requesting a GPIO in fixed_phy_add().

In fixed phy_register(), investigate the "fixed-link"
node and pick the GPIO descriptor from "link-gpios" if
this property exists. Move the corresponding code out
of of_mdio.c as the fixed phy code anyways requires
OF to be in use.
Tested-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Add the tab before '}' and keep the code style consistent.
Signed-off-by: NTonghao Zhang <xiangxia.m.yue@gmail.com>
Reviewed-by: NOr Gerlitz <ogerlitz@mellanox.com>
Acked-by: NSaeed Mahameed <saeedm@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Sergei Shtylyov says:

====================
sh_eth: implement simple RX checksum offload

Here's a set of 7 patches against DaveM's 'net-next.git' repo. I'm implemeting
the simple RX checksum offload (like was done for the 'ravb' driver by Simon
Horman); it has been only tested on the R8A7740 and R8A77980 SoCs, the other
SoCs should just work (according to their manuals)...
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The SH7763 SoC manual describes the Ether MAC's RX checksum offload
the same way as it's implemented in the EtherAVB MACs...
Signed-off-by: NSergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The SH7734 SoC manual describes the Ether MAC's RX checksum offload
the same way as it's implemented in the EtherAVB MACs...
Signed-off-by: NSergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>